Question

The table shows the percent of adults who used computers from 1984

through 2007. What was the rate of change from 1989 to 2007?

Answer 1

3.1 (nearest tenth)

Explanation:

Year (independent variable) = x

Percent of adults (dependent variable) = y

Rate of change is given as =
`(y_2 - y_1)/(x_2 - x_1)`.

Let,

`(1989, 20) = (x_1, y_1)`

`(2007, 76) = (x_2, y_2)`

Plug in the values into the equation

Rate of change =
`(76 - 20)/(2007 - 1989)`

Rate of change =
`(56)/(18) = 3.1` (nearest tenth)